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The WHCU has these red fault lamps:
* WHCU-LRU
* WINDOW SENSOR
* BUS POWER
* WINDOW POWER
* P5-9/CONTROL POWER.
The WHCU-LRU lamp shows a failure of the WHCU unit.
The WINDOW SENSOR lamp shows a failed sensor due to
opens, shorts, or wiring problems.
The BUS POWER lamp shows that there is no power to the
WCHU bus.
ICE AND RAIN PROTECTION - CTRL CABIN - WINDOW HEAT CONTROL UNIT - BITE
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The WINDOW POWER lamp shows that there is no window
power or there is over current to the window. This is due to
either a window, wiring, or a connector open or shorted
problem.
The P5-9/CONTROL POWER lamp shows that there is no power
to the WHCU.
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ICE AND RAIN PROTECTION - CTRL CABIN - WINDOW HEAT CONTROL UNIT - BITE
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30-42-00
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Purpose
The windshield wiper system removes rain, sleet, and snow
from the No. 1R and No. 1L flight compartment windows.
General
Two wiper control switches on the P5 forward overhead panel
give the flight crew control of the system. The system has two
windshield wiper and drive assemblies.
Location
The WIPER control switches are on the P5 forward overhead
panel.
The two windshield wiper assemblies are on the No. 1R and No.
1L flight compartment windows.
The two windshield wiper drive assemblies are on the No. 1R
and No. 1L window sills. You get access to the windshield wiper
drive assemblies from under the P7 glareshield.
ICE AND RAIN PROTECTION - WINDSHIELD WIPER SYSTEM - INTRODUCTION
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Purpose
The windshield wiper and drive assembly does these things:
* Moves the windshield wiper
* Controls the force the wiper applies on the windshield
* Gives rigging adjustments for wiper sweep.
Location
The windshield wipers are in front of the No. 1 right and No. 1
left flight compartment windows.
There are two windshield wiper drive assemblies. They are on
the windshield sill beam behind the P1 and P2 panels.
You get access to the windshield wiper drive assemblies
through panels under the P7 glareshield.
General Description
Each windshield wiper drive assembly moves its windshield
wiper.
Each windshield wiper drive assembly has these parts:
* 28v dc motor
* Rotary to oscillatory reduction gearbox
* Output shaft
* Wiper arm
* Wiper blade.
General
There are two windshield wiper assemblies.
Each windshield wiper assembly has these parts:
* Wiper arm
* Wiper blade.
The wiper arm adjustment nut sets the force the wiper blade
applies to the window.
The arm attachment fittings adjust clocking of the wiper arm to
the output shaft of the windshield wiper drive assembly.
The blade attach nut and fittings set the angle between the
blade and the wiper arm.
Training Information Point
Do not operate the wipers on dry windshields. This can do these
things:
* Scratch the window
* Decrease wiper blade service life
* Remove windshield hydrophobic (rain repellent) coating.
ICE AND RAIN PROTECTION - WINDSHIELD WIPER SYSTEM - WINDSHIELD WIPER AND DRIVE ASSEMBLY
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